Under the FIDIC Red Book and Yellow Book, 1999 editions, the Engineer issues Interim Payment Certificates certifying the amounts due to the Contractor for completed works and materials on site (Sub- Clause 14.6). The Employer is generally bound by the Payment Certificate and must pay accordingly, except where there is a lawful set-off or compensation claim against the Contractor.
Option A is correct because the Employer must pay the amount certified except for compensation claims that may be offset against the payment (Sub-Clause 14.6).
Option D is also correct: If the Employer intends to claim against the Contractor (e.g., for damages or defects), it must notify the Contractor under Sub-Clause 2.5 and provide particulars. The Engineer then assesses and decides on the claim and incorporates any agreed deductions into the Payment Certificate.
Option B is incorrect because the Employer is indeed bound by the Payment Certificate unless lawful deductions or disputes arise.
Option C is incorrect as the Employer can withhold amounts due for compensation claims once these are properly notified and substantiated.
References:
FIDIC Red and Yellow Books, 1999 Edition, Sub-Clause 14.6 - Interim Payments FIDIC Red and Yellow Books, 1999 Edition, Sub-Clause 2.5 - Employer's Claims FIDIC Contract Manager Study Guide, Module on Payment Procedures and Financial Management

FIDIC's Golden Principles emphasize clarity, fairness, and completeness in contract drafting and administration. Incorrect applications often create risks, ambiguities, and disputes.
* Option A is correct and reflects a good application of Golden Principles. When deleting clauses from the General Conditions, these must be replaced adequately in the Particular Conditions so that no essential contractual scope or responsibilities are lost or left undefined.
* Option B is incorrect and reflects an improper deviation from the standard. The standard Commencement Date notification period is 42 days after the Contractor receives the Letter of Acceptance (per Sub-Clause 8.1). Extending it to 60 days without valid reason or clear agreement introduces uncertainty and potential delay.
* Option C can be a legitimate contractual modification, provided it is agreed by the parties. Extending the Contractor's notice period for suspension from 21 days to 3 months is a significant change but not inherently contrary to Golden Principles if done transparently and fairly.
* Option D is incorrect and reflects a poor application of Golden Principles. Deleting all clauses referring to the DAAB/DAB (Dispute Adjudication Board) removes a critical dispute avoidance and resolution mechanism, undermining contract fairness and efficiency.
Therefore, Options B and D represent incorrect applications of the Golden Principles.
References:
FIDIC Contract Manager Study Guide, Module on Legal and Ethical Considerations and Golden Principles FIDIC Red Book 2017 Edition, Sub-Clause 8.1 - Commencement of Works FIDIC Red Book 2017 Edition, Clause 21 - Disputes and DAAB

Under FIDIC Red Book 2017, Clause 21 (Dispute Avoidance/Adjudication Board), particularly Sub-Clause
21.3, provides for the DAAB's role in dispute avoidance, including informal assistance during site visits. This is a proactive mechanism designed to resolve issues before they escalate into formal disputes.
Key procedural requirements include: (1) both Parties must agree that they want DAAB involvement (Option A), (2) a joint written request must be submitted to the DAAB before assistance is provided (Option C), and (3) both Parties must be present during any informal discussions to ensure transparency and fairness (Option D). These steps ensure neutrality, equal participation, and procedural integrity.
Option B is incorrect and therefore the correct answer to the question. The Engineer has no formal role in authorizing or issuing a "non-objection letter" for DAAB informal assistance. The DAAB operates independently of the Engineer, and its involvement is strictly based on joint agreement between the Employer and Contractor. Introducing Engineer approval would contradict the independence and dispute avoidance function of the DAAB.
Thus, Option B does not belong to the required steps and is not supported by FIDIC provisions.

Option D is correct because contract drafting should strategically allocate risks between parties based on who can best manage them and the Employer's budget for risk and reward. Understanding risk appetite is key to tailoring FIDIC contracts appropriately.
Option A is exaggerated; while amendments can introduce issues, careful drafting can preserve benefits of standardization.
Option B is partly true but mixing arrangements is complex and not always straightforward.
Option C is incorrect; the Employer usually chooses the contract form.
References:
FIDIC Contract Management Guidelines - Golden Principles
FIDIC Contract Manager Study Guide, Module on Contract Drafting and Risk Allocation

Option C is not true because under the FIDIC Silver Book (1999 edition), the delay damages (liquidated damages) specified in the contract are intended as full compensation for the Employer's loss resulting from late completion. The contract usually excludes other claims for actual losses or extra costs beyond the delay damages.
Option A is true; Variations can include extensions of time.
Option B is true; identifying delay causes is essential for claims and defences.
Option D is true; if the Employer causes suspension not attributable to the Contractor, delay damages claims by the Employer are generally unjustified.
Thus, the Employer cannot claim extra costs over and above delay damages as per typical Silver Book provisions.
References:
FIDIC Silver Book 1999 Edition, Sub-Clause 8 - Time for Completion and Delay Damages FIDIC Silver Book 1999 Edition, Sub-Clause 2.5 - Employer's Claims FIDIC Contract Manager Study Guide, Module on Claims and Delay Damages